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you will have to deal with the u code first. This is a communication problem between computers. My first guess is you have a bad computer or an open wire somewhere. Their is no way a backyard mechanic can do this without the proper tools to diagnose and with the knowledge to not cause further damage.

Map sensor bad or vacuum &/or power to it missing. Map sensor located on intake manifold or firewall. It has a vacuum hose & electrical connector attached to it. To verify it is bad disconnect electrical connector to it while running. Idle should smooth out & run good. If so need to replace.

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P0101 is the MAF (mass air flow) sensor that measure the amount of air entering the engine. Not enough air means rich running and a possible cause of fuel smell. Apart from running a little rougher there aren't always many signs that something is wrong.
P0107 is the MAP (manifold absolute pressure) sensor and responds to changes in manifold inlet pressure (vacuum). Problems cause include hard to start, long cranking times, sputtering/missing, blowing black smoke, poor fuel economy.

P0340 is for camshaft position sensor circuit malfunction so the problem can be in you hav already changed sensor, then you need to check wiring from sensor to ecu and if the wires are ok than check the ecu! It can be either of them cousing the problem.